Electric winch braking device and braking control method

Abstract

The invention belongs to the technical field of electric winch braking, and particularly relates to an electric winch braking device and a braking control method.The electric winch braking device comprises an alternating current contactor KM2, an alternating current contactor KM3, a relay JZ1 and a controller MCU, and the controller MCU comprises a DO module and a DI module. And the controller MCU acquires the states of the alternating current contactor KM2 and the alternating current contactor KM3 to control the operation and stop of the winch motor 1 and the winch motor 2.

Description

Technical Field

[0001] The invention belongs to the technical field of electric winch braking, and in particular relates to an electric winch braking device and a braking control method. Background Art

[0002] Most of the existing electric winches use friction braking or ratchet to prevent the winch from back-dragging. No matter which method is used, it is a mechanical brake, which requires additional mechanical structure and control parts, and is not suitable for high-speed dynamic braking of the winch. When the winch is back-draggled and running at high speed, the friction plate will be damaged or even destroyed when friction braking is used; and when the ratchet is used for braking, especially under heavy load conditions, the pawl and ratchet will be impacted, which may even damage the equipment. Summary of the invention

[0003] The present invention aims to provide an electric winch braking device and a braking control method to solve the deficiencies in the prior art.

[0004] The present invention provides the following technical solutions: An electric winch braking device comprises an AC contactor KM2, an AC contactor KM3, a relay JZ1 and a controller MCU, wherein the controller MCU comprises a DO module and a DI module, wherein the AC contactor KM2 is arranged between a winch motor 1 and a driver 1, and the AC contactor KM3 is arranged between a winch motor 2 and a driver 2, and control ends of the AC contactor KM2, the AC contactor KM3 and the relay JZ1 are all provided with two ends A1 and A2, and the controller MCU controls the closing and opening of the AC contactors KM2 and KM3 through the relay JZ1, and the controller MCU collects the states of the AC contactors KM2 and KM3 to control the operation and stop of the winch motor.

[0005] Preferably, the output end of the relay JZ1 is provided with two groups of normally closed contacts 21, 22 and 31, 32, the output end of the AC contactor KM2 and the output end of the AC contactor KM3 are both provided with two groups of normally open contacts 1, 2 and 3, 4 and two groups of normally closed contacts R1, R2 and R3, R4, and the acquisition end of the AC contactor KM2 and the acquisition end of the AC contactor KM3 are both provided with a group of normally open contacts 61 and 62.

[0006] Preferably, the input end of the DI module is connected to the acquisition end of AC contactor KM2 and AC contactor KM3, the output end of the DO module is connected to the control end of relay JZ1, and the output end of relay JZ1 is connected to the control end of AC contactor KM2 and AC contactor KM3.

[0007] A braking control method using the electric winch braking device, when the winch is in a braking state and starts, the DO module outputs 24V to control the output end of the relay JZ1 to close, thereby controlling the AC contactor KM2 and the AC contactor KM3 to act so that the three-phase short-circuit state of the winch motor 1 and the winch motor 2 is released, and at the same time, the DI module collects the states of the AC contactor KM2 and the AC contactor KM3. If the DI module collects two 24V signals to determine that the AC contactor acts accurately, the braking state of the electric winch is released, and the controller MCU sends a start instruction to the driver 1 and the driver 2 through the CAN interface to control the winch motor 1 and the winch motor 2 to rotate forward and reverse respectively; When the winch fails and is dragged by the load and stalls, the controller MCU receives the winch motor disability response command, and the DO module outputs 0V to control the output end of the relay JZ1 to be disconnected, thereby controlling the AC contactors KM2 and KM3 to short-circuit the three phases of the winch motor 1 and the winch motor 2. At the same time, the DI module collects the status of the AC contactors KM2 and KM3. If the DI module collects two 0V signals to determine that the AC contactor is operating accurately, the electric winch is controlled to start the braking state.

[0008] Preferably, when the DO module supplies 24V to the control terminals A1 and A2 of the relay JZ1, the two groups of normally closed contacts 21, 22 and 31, 32 at the output terminal of the relay JZ1 are disconnected, so that the 380V power supply to the control terminals A1 and A2 of the AC contactor KM2 and the AC contactor KM3 is cut off, the normally open contacts 1, 2 and 3, 4 are in an open state, the normally closed contacts R1, R2 and R3, R4 are in a closed state, the three-phase coils of the winch motor 1 and the winch motor 2 are short-circuited and enter a braking state, the normally open contacts 61 and 62 of the AC contactor KM2 and the AC contactor KM3 are in a disconnected state, the DI module collects 0V, and the controller MCU determines that the winch is in a braking state by collecting 0V.

[0009] Preferably, when the DO module supplies 0V to the control terminals A1 and A2 of the relay JZ1, the two groups of normally closed contacts 21, 22 and 31, 32 at the output terminal of the relay JZ1 are closed, so that the control terminals A1 and A2 of the AC contactor KM2 and the AC contactor KM3 are connected to 380V, the normally open contacts 1, 2 and 3, 4 are in a closed state, the normally closed contacts R1, R2 and R3, R4 are in a disconnected state, the winch motor 1 and the winch motor 2 are in a normal operating state, the normally open contacts 61 and 62 of the AC contactor KM2 and the AC contactor KM3 are in a closed state, the DI module collects 24V, and the controller MCU determines that the winch is in a normal operating state by collecting 24V.

[0010] Preferably, the AC contactor KM2 and the AC contactor KM3 are braked by short-circuiting two circuits. When the braking time is extended, the two circuits serve as backup for each other.

[0011] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art: The present invention utilizes the three-phase short-circuiting of a permanent magnet synchronous motor to force the motor rotor to stop rotating by an electromagnetic field, thereby achieving rapid braking. The present invention is suitable for high-speed dynamic braking during equipment failure and does not require an additional mechanical structure. It can be used as a supplementary backup for a mechanical braking device. At the same time, the present invention adopts two-way short-circuit braking, and the two ways can achieve backup when the braking time is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is an electrical schematic diagram of the present invention; Figure 2 is a flow chart of the braking control part of the present invention; Figure 3 is a flow chart of the braking control part of the present invention; Figure 4 It is the interface cross-linking diagram of the present invention. DETAILED DESCRIPTION

[0013] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that those skilled in the art can more clearly understand how to practice the present invention. Although the present invention is described in conjunction with its preferred specific embodiments, these embodiments are only illustrative and are not intended to limit the scope of the present invention.

[0014] An electric winch braking device comprises an AC contactor KM2, an AC contactor KM3, a relay JZ1 and a controller MCU, wherein the controller MCU comprises a DO module and a DI module, wherein the AC contactor KM2 is arranged between a winch motor 1 and a driver 1, and the AC contactor KM3 is arranged between a winch motor 2 and a driver 2, and control ends of the AC contactor KM2, the AC contactor KM3 and the relay JZ1 are all provided with two ends A1 and A2, and the controller MCU controls the closing and opening of the AC contactors KM2 and KM3 through the relay JZ1 to realize rapid braking of the winch motor, and the controller MCU collects the states of the AC contactors KM2 and KM3 to control the operation and stop of the winch motor 1 and the winch motor 2.

[0015] Specifically, the output end of the relay JZ1 is provided with two groups of normally closed contacts 21, 22 and 31, 32, the output end of the AC contactor KM2 and the output end of the AC contactor KM3 are both provided with two groups of normally open contacts 1, 2 and 3, 4 and two groups of normally closed contacts R1, R2 and R3, R4, and the acquisition end of the AC contactor KM2 and the acquisition end of the AC contactor KM3 are both provided with a group of normally open contacts 61 and 62.

[0016] Specifically, the input end of the DI module is connected to the acquisition end of the AC contactor KM2 and the AC contactor KM3, the output end of the DO module is connected to the control end of the relay JZ1, and the output end of the relay JZ1 is connected to the control end of the AC contactor KM2 and the AC contactor KM3.

[0017] A braking control method using the electric winch braking device, when the winch is in a braking state and starts, the DO module outputs 24V to control the output end of the relay JZ1 to close, thereby controlling the AC contactor KM2 and the AC contactor KM3 to operate so that the three-phase short-circuit state of the winch motor 1 and the winch motor 2 is released, and at the same time, the DI module collects the states of the AC contactor KM2 and the AC contactor KM3. If the DI module collects two 24V signals to determine that the AC contactor operates accurately, the braking state of the electric winch is released, and the controller MCU delays 500ms and then sends a start instruction to the driver 1 and the driver 2 through the CAN interface to respectively control the winch motor 1 and the winch motor 2 to rotate forward and reverse; When the winch fails and is dragged back by the load and stalls, the controller MCU sends a generator disable command to the driver 1 and the driver 2 to control the winch motor to stop. When the controller MCU receives the winch motor disable response command, the DO module outputs 0V to control the output end of the relay JZ1 to disconnect, thereby controlling the AC contactor KM2 and the AC contactor KM3 to short-circuit the three phases of the winch motor 1 and the winch motor 2. At the same time, the DI module collects the status of the AC contactor KM2 and the AC contactor KM3. If the DI module collects two 0V signals to determine that the AC contactor is accurately operating, the electric winch is controlled to start the braking state, that is, when the winch motor speed is lower than a certain threshold or after a delay of 2s, mechanical braking is performed.

[0018] Specifically, when the DO module supplies 24V to the control terminals A1 and A2 of the relay JZ1, the two groups of normally closed contacts 21, 22 and 31, 32 at the output terminal of the relay JZ1 are disconnected, so that the 380V power supply to the control terminals A1 and A2 of the AC contactor KM2 and the AC contactor KM3 is cut off, the normally open contacts 1, 2 and 3, 4 are in an open state, the normally closed contacts R1, R2 and R3, R4 are in a closed state, the three-phase coils of the winch motor 1 and the winch motor 2 are short-circuited and enter a braking state, the normally open contacts 61 and 62 of the AC contactor KM2 and the AC contactor KM3 are in a disconnected state, the DI module collects 0V, and the controller MCU determines that the winch is in a braking state by collecting 0V.

[0019] Specifically, when the DO module supplies 0V to the control terminals A1 and A2 of the relay JZ1, the two groups of normally closed contacts 21, 22 and 31, 32 at the output terminal of the relay JZ1 are closed, so that the control terminals A1 and A2 of the AC contactor KM2 and the AC contactor KM3 are connected to 380V, the normally open contacts 1, 2 and 3, 4 are in a closed state, the normally closed contacts R1, R2 and R3, R4 are in a disconnected state, the winch motor 1 and the winch motor 2 are in a normal operating state, the normally open contacts 61 and 62 of the AC contactor KM2 and the AC contactor KM3 are in a closed state, the DI module collects 24V, and the controller MCU determines that the winch is in a normal operating state by collecting 24V.

[0020] Specifically, the AC contactor KM2 and the AC contactor KM3 are braked by short-circuiting two circuits. When the braking time is extended, the two circuits serve as backup for each other.

[0021] In addition, when the entire electric winch is abnormally powered off, the 380V power supply of the control terminals A1 and A2 of the AC contactor KM2 and the AC contactor KM3 is cut off, and the entire electric winch enters the braking state. When the mechanical brake device of the electric winch fails due to wear or jamming, the controller MCU can control it to enter the short-circuit braking state, thereby realizing the emergency backup of the mechanical brake.

[0022] The present invention realizes rapid braking of the winch motor by controlling the closing and opening of the AC contactor KM2 and the AC contactor KM3 through the relay JZ1 by the controller MCU, and the controller MCU collects the states of the AC contactor KM2 and the AC contactor KM3 to control the operation and stop of the winch motor 1 and the winch motor 2.

[0023] The above description is only a preferred implementation manner of the present invention, but the protection scope of the present invention is not limited thereto, and any modification and replacement based on the technical solution and inventive concept provided by the present invention should be included in the protection scope of the present invention.

Claims

1. An electric winch brake device, comprising an AC contactor KM2, an AC contactor KM3, a relay JZ1 and a controller MCU, wherein the controller MCU comprises a DO module and a DI module, and is characterized in that: The AC contactor KM2 is arranged between the winch motor 1 and the driver 1, and the AC contactor KM3 is arranged between the winch motor 2 and the driver 2. The control ends of the AC contactor KM2, the AC contactor KM3 and the relay JZ1 are all provided with two ends A1 and A2. The controller MCU controls the closing and opening of the AC contactor KM2 and the AC contactor KM3 through the relay JZ1, and the controller MCU collects the states of the AC contactor KM2 and the AC contactor KM3 to control the operation and stop of the winch motor.

2. The electric winch brake device according to claim 1, characterized in that: The output end of the relay JZ1 is provided with two groups of normally closed contacts 21, 22 and 31, 32, the output end of the AC contactor KM2 and the output end of the AC contactor KM3 are both provided with two groups of normally open contacts 1, 2 and 3, 4 and two groups of normally closed contacts R1, R2 and R3, R4, and the acquisition end of the AC contactor KM2 and the acquisition end of the AC contactor KM3 are both provided with a group of normally open contacts 61 and 62.

3. The electric winch brake device according to claim 2, characterized in that: The input end of the DI module is connected to the acquisition end of the AC contactor KM2 and the AC contactor KM3, the output end of the DO module is connected to the control end of the relay JZ1, and the output end of the relay JZ1 is connected to the control end of the AC contactor KM2 and the AC contactor KM3.

4. A braking control method using the electric winch braking device according to any one of claims 1 to 3, characterized in that: When the winch is in the braking state and starts, the DO module outputs 24V to control the output end of the relay JZ1 to close, thereby controlling the AC contactor KM2 and the AC contactor KM3 to release the three-phase short-circuit state of the winch motor 1 and the winch motor 2. At the same time, the DI module collects the status of the AC contactor KM2 and the AC contactor KM3. If the DI module collects two 24V signals to determine that the AC contactor is accurately operating, the braking state of the electric winch is released, and the controller MCU sends a start command to the driver 1 and the driver 2 through the CAN interface to control the winch motor 1 and the winch motor 2 to rotate forward and reverse respectively; When the winch fails and is dragged by the load and stalls, the controller MCU receives the winch motor disability response command, and the DO module outputs 0V to control the output end of the relay JZ1 to be disconnected, thereby controlling the AC contactors KM2 and KM3 to short-circuit the three phases of the winch motor 1 and the winch motor 2. At the same time, the DI module collects the status of the AC contactors KM2 and KM3. If the DI module collects two 0V signals to determine that the AC contactor is operating accurately, the electric winch is controlled to start the braking state.

5. The brake control method of an electric winch according to claim 4, characterized in that: When the DO module supplies 24V to the control terminals A1 and A2 of the relay JZ1, the two groups of normally closed contacts 21, 22 and 31, 32 at the output terminal of the relay JZ1 are disconnected, so that the 380V power supply to the control terminals A1 and A2 of the AC contactors KM2 and KM3 is cut off, the normally open contacts 1, 2 and 3, 4 are in an open state, the normally closed contacts R1, R2 and R3, R4 are in a closed state, the three-phase coils of the winch motor 1 and the winch motor 2 are short-circuited and enter the braking state, the normally open contacts 61 and 62 of the AC contactors KM2 and KM3 are in an open state, the DI module collects 0V, and the controller MCU determines that the winch is in a braking state by collecting 0V.

6. The brake control method of an electric winch according to claim 4, characterized in that: When the DO module supplies 0V to the control terminals A1 and A2 of the relay JZ1, the two groups of normally closed contacts 21, 22 and 31, 32 at the output terminal of the relay JZ1 are closed, so that the control terminals A1 and A2 of the AC contactors KM2 and KM3 are connected to 380V, the normally open contacts 1, 2 and 3, 4 are in a closed state, the normally closed contacts R1, R2 and R3, R4 are in a disconnected state, the winch motor 1 and the winch motor 2 are in a normal operating state, the normally open contacts 61 and 62 of the AC contactors KM2 and KM3 are in a closed state, the DI module collects 24V, and the controller MCU determines that the winch is in a normal operating state by collecting 24V.

7. The brake control method of an electric winch according to claim 4, characterized in that: The AC contactor KM2 and the AC contactor KM3 are braked by short-circuiting two circuits. When the braking time is extended, the two circuits serve as backup for each other.

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